ignition reference

[David Doddek]

>All this talk of making/using an encoder, just use a steel wheel with a VR
>pickup, like most everybody else is doing. If you like you could also use a
>hall effect pickup. One thing again, is that if you are getting timing from
>the distributer, it will be subjected to a bunch of error, many from chain
>(belt) stretch, and other cam related jitter. Ask someone how their
>electromotive distributer pickup works! (have has several bad stories) 
>
>But, back to the problem, you can easily get a laser cut wheel made of steel
>(or plastic) that can be made to your fancy. The cost will be < $50.00 QTY
>1. All you need is a DXF file from your CAD program, and you have it, dosent
>matter what shape or size. 
>
>Sandy
>
>
>
Try this.  Go to a machine parts store.  Buy a gear for chain with the
number of teeth that you want, ie 36.  Take it to a local machine shop and
have them cut off just a fraction of the teeth to make the ends flat and
wa-la, a timing wheel with highly accurate spacing.  Or of you want more
teeth, then try a regular gear, but that may cost a little more.  With a
gear for small enough chain, you should be able to get even a 60 tooth gear.

David J. Doddek                                          |pantera at pobox.com
Owner SGD Electronics & Development Engr for Caterpillar |h 309 685-7965
Formula SAE Team Sidewinder 94-95                        |w 309 578-2931
89 T-bird SC,  69 Fairlane w/SGD EFI                     |fx 217 428-4686
74 Pantera w/Electromotive Tec-II Twin turbos and Nitros |
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